Ensure typing echo pref is saved.

chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview The entry point for all ChromeVox2 related code for the
  * background page.
  */
 
 goog.provide('Background');
@@ skipping 96 matching lines @@
   });
 
   if (cvox.ChromeVox.isChromeOS) {
     Object.defineProperty(cvox.ChromeVox, 'modKeyStr', {
       get: function() {
         return (this.mode == ChromeVoxMode.CLASSIC ||
             this.mode == ChromeVoxMode.COMPAT) ?
                 'Search+Shift' : 'Search';
       }.bind(this)
     });
+
+    Object.defineProperty(cvox.ChromeVox, 'typingEcho', {
+      get: function() {
+        return parseInt(localStorage['typingEcho'], 10);
+      }.bind(this),
+      set: function(v) {
+        localStorage['typingEcho'] = v;
+      }.bind(this)
+    });
   }
 
   Object.defineProperty(cvox.ChromeVox, 'isActive', {
     get: function() {
       return localStorage['active'] !== 'false';
     },
     set: function(value) {
       localStorage['active'] = value;
     }
   });
@@ skipping 626 matching lines @@
   return new RegExp('^(' + globs.map(function(glob) {
     return glob.replace(/[.+^$(){}|[\]\\]/g, '\\$&')
         .replace(/\*/g, '.*')
         .replace(/\?/g, '.');
   }).join('|') + ')$');
 };
 
 new Background();
 
 });  // goog.scope